Install its-storyboard plugin on review-dev.o.o

Install Gerrit its-storyboard plugin[1] to support integration between
gerrit and storyboard. Install the plugin from tarballs.o.o[2] to
review-dev.o.o for testing.

Additional requirement for this change to take effect:
1. A parameter needs to be set to enable its-storyboard plugin.  This
   is a per project setting in refs/meta/config (project.config file)
   If we want to enable for all project then set this param in
   All-Projects:
    [plugin "its-storyboard"]
      enabled = true

[1] https://gerrit.googlesource.com/plugins/its-storyboard
[2] http://tarballs.openstack.org/ci/gerrit/plugins/its-storyboard

Change-Id: Ida9c7ece6b53df10da1a95291ec2b2de1adb7fbd

modules/openstack_project/manifests/review_dev.pp

@@ -178,6 +178,7 @@ class openstack_project::review_dev (
 
   gerrit::plugin { 'javamelody': version       => '3fefa35' }
   gerrit::plugin { 'delete-project': version   => '4b7410c' }
+  gerrit::plugin { 'its-storyboard': version   => 'a9cb131' }
 
   # create a file containing the ssl certificate
   file { '/home/gerrit2/storyboard-dev.crt':